Does it matter?
In this state of matter, molecules bounce freely off of each other
gas
What is the definition of energy?
the ability to do work
Water freezes at _______ degrees F
32 degrees F
Electrons have ____________ charge
negative
when a force moves an object, we call this
work
This state of matter has a definite shape
solid
This type of energy enables hearing. It is considered kinetic because it needs a conductor, and it is an energy of vibration.
Sound energy
What is the boiling point of water?
0 degrees C, or 212 degrees F
A push or a pull
force
What is kinetic energy?
energy in motion
This state of matter has no definite shape and flows from one place to another
liquid
This is the energy in moving electrons
Electrical energy
This it the point at which a substance changes from a liquid to a gas
boiling point
the force that resists motion
friction
What is potential energy?
stored energy-which could be released
In this state of matter, the molecules have room to roll over each other
liquid
This type is contained in the nucleus of an atom
nuclear energy
This is the point at which a substance changes from a solid to a liquid
melting point
anything that has mass and takes up space
matter
This is the attraction that exists among all particles of matter in the universe
gravity
In this state of matter, the molecules vibrate tightly together in position (very compact)
solid
mechanical energy
This is the point at which a substance changes from a liquid to a solid
freezing point
a device that converts energy from natural sources into useful work is called an
engine
When a substance is heated, how does it react?
it expands (because of heat/ kinetic energy)